0.9K(0.5)Na(0.5)NbO(3)-0.1LiBiO(3)　(KNN-0.1LB)　transparent　ceramics　with　high　optical　transmittance　of　74%　(at　900　nm)　were　successfully　prepared　by　cold　sintering　assisted　sintering　(CSAS)　method.　The　effects　of　CSAS　process　and　dwell　time　on　transmittance,　phase　structure,　microstructure　and　electrical　properties　of　the　ceramics　were　investigated　in　detail.　Comparing　with　conventional　sintering　(CS),　the　CSAS　process　can　significantly　increase　the　densities　of　KNN-0.1LB　ceramics.　The　potassium-rich　phase　induced　by　＂dissolution-precipitation＂　during　CSAS　process　adheres　to　the　grain　boundaries　and　the　grain　surface,　inhibiting　the　volatilization　of　potassium/sodium　and　grain　growth.　Under　the　condition　of　long　dwell　time,　the　potassium-rich　phase　and　alkali　metal　elements　introduced　by　the　liquid　medium　of　CSAS　process　can　effectively　compensate　for　the　volatilization　of　A-site　ions.　Simultaneously,　proper　dwell　time　also　helps　to　eliminate　pores　and　promote　densification.　As　a　result,　the　properties　of　CSAS-based　KNN-0.1LB　ceramics　have　been　evidently　improved,　which　indicating　the　CSAS　process　can　guide　the　design　and　fabrication　of　other　transparent　ceramics　with　excellent　performance.　(C)　2020　Elsevier　B.V.　All　rights　reserved.